(Updated) Sigma DP2 vs Panasonic G1 vs Olympus E-P1
http://picture.stanford.edu/Photo/Equipment%20Test/DP2_G1_EP1/Compact_DSLR_1.html
The difference in colour between the two MicrFourThirds camera and the Sigma DP2 is huge! And you cn clearly see the E-P1 sharpness thanks to the weak AA-Filter.
UPDATE: A new comparison is available here (with the DP1 instead of the DP2)
http://www.ukphotosafari.org/e-p1-team-review/2009/7/7/purple-perception-problem.html

Ranger 9
3 years ago |Pfff. Crude flat-target tests, so poorly controlled that we have no way of knowing whether the results we see are attributable to camera performance, lens performance, raw-image processing, web-image processing, user technique or lack thereof, sheer luck, or something else.
And as for “E-P1 sharpness thanks to the weak AA-Filter” — is that really “sharpness,” or is it “false resolution” caused by aliasing?
No way of knowing from this. Great test if you need to know which camera is best for photographing magazine covers in somebody’s office, but otherwise…?